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Hybrid vehicle

a hybrid vehicle and hybrid technology, applied in the direction of machines/engines, electrical control, exhaust treatment electric control, etc., can solve the problems of easy clogging of the particle filter, misfire or etc., to achieve easy worsening of the combustion of the engine, short time, and increase in rotational fluctuation

Active Publication Date: 2020-09-08
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a system for controlling the engine in a hybrid vehicle to improve engine performance during filter regeneration. By stopping and starting the engine frequently, the system controls the engine to ensure stable combustion and reduces the negative effects of incomplete regeneration. The system uses two conditions to determine when to execute filter regeneration control: one condition is based on the vehicle's activation history, and the other condition is based on the current driving mode. This allows the system to optimize engine performance during filter regeneration and ensures a secure opportunity to execute the control.

Problems solved by technology

When the particulate filter continues to collect the PM, the particulate filter is clogged.
When the engine is operated in the different state from the normal state, combustion of the engine is easily worsened.
When the filter regeneration control is executed in a state where the combustion is hard to become stable, the combustion becomes unstable, causing misfire or increase in rotational fluctuation.
Particularly, a period immediately after start of the engine is inappropriate for the execution of the filter regeneration control, because the combustion is unstable.
However, in this case, in a hybrid vehicle that performs intermittent operation of the engine, the continuous operation of the engine often finishes in a short time, and therefore, there is a possibility that the opportunity of the execution of the filter regeneration control cannot be sufficiently obtained.
The combustion immediately after the start of the engine becomes unstable more easily, as the period of the stop of the engine before the start increases.
Therefore, when the CD mode is selected, the combustion of the engine tends to become unstable more easily than when the CS mode is selected.

Method used

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first embodiment

[0019]Hereinafter, a first embodiment of a hybrid vehicle will be described in detail with reference to FIG. 1 and FIG. 2. As shown in FIG. 1, an engine 11 is mounted on the hybrid vehicle (hereinafter, merely referred to as a vehicle 10) in the embodiment. The vehicle 10 includes two generator-motors (a first generator-motor 12 and a second generator-motor 13) to function as both of an electric motor that is a driving source of the vehicle 10 and an electric generator that receives dynamic power of the engine 11 and generates electric power.

[0020]The vehicle 10 is provided with a planetary gear mechanism 17 including three rotating elements: a sun gear 14, a planetary carrier 15 and a ring gear 16. The planetary carrier 15 of the planetary gear mechanism 17 is linked with the engine 11 through a transaxle damper 18, and the sun gear 14 of the planetary gear mechanism 17 is linked with the first generator-motor 12. The ring gear 16 of the planetary gear mechanism 17 is provided inte...

second embodiment

[0047]Next, a second embodiment of the hybrid vehicle will be described in detail with reference to FIG. 3 and FIG. 4. In the embodiment, constituents in common with the above embodiment are denoted by identical reference characters, and detailed descriptions for the constituents are omitted.

[0048]A hybrid vehicle in the embodiment has the same hardware configuration as the vehicle 10 in the first embodiment, and there is a difference in the contents of the processes to be executed by the engine control device 38 and the vehicle control device 39, as described below.

[0049]First, the vehicle control device 39 in the embodiment selects one control mode from a plurality of control modes including a CS (Charge Sustaining) mode in which decrease in the state-of-charge SOC of the battery 28 is restrained and a CD (Charge Depleting) mode in which the electric power of the battery 28 is consumed, and controls the vehicle 10 depending on the selected control mode. In the embodiment, the vehi...

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Abstract

A hybrid vehicle includes a vehicle control device to perform a traveling control so as to allow switching between an HV traveling in which the hybrid vehicle travels while an engine works and an EV traveling in which the hybrid vehicle travels while working of the engine is stopped, and an engine control device to execute a filter regeneration control that is an engine control for removing particulate matter deposited in a filter. The engine control device adopts satisfaction of a predetermined first condition, as a requirement for execution of the filter regeneration control, when the number of times of start of the engine after vehicle activation is one, and adopts satisfaction of a second condition, which is satisfied more easily than the first condition, as a requirement for execution of the filter regeneration control, when the number of times of the start is two or more.

Description

INCORPORATION BY REFERENCE[0001]The disclosure of Japanese Patent Application No. 2018-004032 filed on Jan. 15, 2018 including the specification, drawings and abstract is incorporated herein by reference in its entirety.BACKGROUND1. Technical Field[0002]The disclosure relates to a hybrid vehicle equipped with an engine including a filter that collects particulate matter in exhaust gas.2. Description of Related Art[0003]In some cases, for cleaning exhaust gas from an engine such as an in-vehicle engine, there is provided a particulate filter that collects particulate matter (PM) in the exhaust gas. When the particulate filter continues to collect the PM, the particulate filter is clogged. Therefore, the engine including the particulate filter executes a filter regeneration control that is an engine control for removing the PM deposited in the filter. During execution of the filter regeneration control, the engine is operated in a different state from a normal state, for example, for ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F01N3/00B60K6/445F01N3/023B60W20/16F02D41/02F01N9/00B60W50/00
CPCF02D41/029B60W20/16F01N9/002B60K6/445F01N3/023B60W2510/0628B60W2520/10B60W2510/068B60W2050/002B60W2510/0623F01N2590/11B60W2510/0676B60Y2300/476B60W2540/10B60Y2200/92B60W2510/244B60W20/20B60W2710/06Y02T10/62B60K6/24B60K6/26B60K6/28B60W10/06B60W10/08B60W10/26B60W2530/12B60W20/13F02D2041/1417F02D2200/503
Inventor ANZAWA, TAKUMI
Owner TOYOTA JIDOSHA KK